Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2ab20cdb22484b…

MALICIOUS

PDF

76.0 KB Created: 2021-09-03 08:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fd6214436325a376f2be3cd6648d62e8 SHA-1: 4d066d07d1f336f52f0dda85e8e9edd47e7aa679 SHA-256: fc2ab20cdb22484b407c128b50bcee4f860e83633c320335e70f695ad9570240
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The structure suggests an attempt to leverage SEO or compromised hosting for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/marojij.pdf In PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/lozizeruwerevotosetokur.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/31ffb332e29085e5d2b26ddbd22d8c4f/42492758692.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/f051d4197cc69cd790e9900ef3c415de/dokimis.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/10673205992.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b14f8b9761---xopekizopavamofovinanekez.pdfIn PDF document text
    • http://gibisch.org/files/files/78624867399.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b134ef524fc---68982851600.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/mitogisije.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22336881532.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093a36f0c41d---luritumetafusadew.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210525000125.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/dapemavarokej.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/80548825257.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/88812900786.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/dutumutoribadikojiru.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ipl2i9tmgn8segib49vpts803n/jexozupulofot.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/31c9164e512982b58a010afbfb3b0fd3/punekufiwejujukusev.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/maponirobawugilibux.pdfIn PDF document text
    • http://unsersohn.ch/images/file/baropupama.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/51032695735.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef61235afb---76130128413.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/81884474679.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/83628350297.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/47014020589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=english+words+list+with+urdu+meaning+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC579 16828 bytes
SHA-256: 0a343cf705fcb10df6b0ff955be20155fd83af73cba0a938a831c7ee7b2d6499
font_01_sfnt_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 11116 bytes
SHA-256: c7d81678836a2f700fb5257ec5c9eb8428f35e5b8f1e523fd7ad8400a20a78b7
font_02_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1